Display Device

1. A display device comprising: a display panel; a pressure sensor disposed below the display panel, the pressure sensor configured to detect pressure applied to the display panel; a supporting layer disposed on a surface of the pressure sensor facing away from the display panel; and a middle frame disposed below the pressure sensor, the middle frame comprising a receiving groove, which corresponds to the pressure sensor and the supporting layer, wherein the middle frame comprises a bottom surface, a recessed bottom surface recessed from the bottom surface, and side surfaces disposed between the bottom surface and the recessed bottom surface, wherein the recessed bottom surface of the middle frame and the side surfaces of the middle frame define the receiving groove, and wherein the side surfaces of the middle frame overlap the display panel in a first direction perpendicular to the recessed bottom surface of the middle frame.

2. The display device of claim 1 , wherein the pressure sensor is thicker than the supporting layer.

3. The display device of claim 1 , wherein the supporting layer has a thickness of 10 μm to 500 μm.

4. The display device of claim 1 , wherein the pressure sensor has a thickness of 50 μm to 250 μm.

5. The display device of claim 1 , wherein the supporting layer is more rigid than the pressure sensor.

6. The display device of claim 1 , further comprising: a panel bottom member disposed between the display panel and the pressure sensor, wherein a first surface of the pressure sensor is attached to the panel bottom member.

7. The display device of claim 6 , wherein the receiving groove overlaps with the pressure sensor and the supporting layer in the first direction.

8. The display device of claim 7 , wherein the supporting layer is spaced apart from the recessed bottom surface in the first direction.

9. The display device of claim 8 , where a distance between the supporting layer and the recessed bottom surface is 0.1 mm to 0.4 mm.

10. The display device of claim 9 , wherein the pressure sensor comprises first and second sensing cells, and the supporting layer is disposed to overlap at least one of the first and second sensing cells.

11. The display device of claim 10 , wherein the pressure sensor comprises: a first substrate and a second substrate; a first driving electrode a second driving electrode, a first sensing electrode, and a second sensing electrode disposed on a first surface of the first substrate facing the second substrate; a first pressure sensing layer disposed on a first surface of the second substrate facing the first substrate; and a second pressure sensing layer contacting with the second driving electrode and the second sensing electrode, wherein the first pressure sensing layer overlaps with the first driving electrode and the first sensing electrode, and wherein gaps are formed between the first pressure sensing layer and the first driving electrode and between the first pressure sensing layer and the first sensing electrode.

12. The display device of claim 11 , wherein the second pressure sensing layer is disposed on at least one side of the second driving electrode and on at least one side of the second sensing electrode.

13. The display device of claim 12 , further comprising: a waterproof member disposed between the middle frame and the panel bottom member, wherein the waterproof member is disposed along edges of the middle frame and is in contact with the middle frame and the panel bottom member.

14. The display device of claim 1 , wherein the pressure sensor comprises first and second sensing cells, the first cell is configured to detect a resistance variation caused by pressure, and the second sensing cell is configured to detect a resistance variation caused by temperature.

15. A display device comprising: a display panel; a pressure sensor disposed below the display panel; a middle frame disposed below the pressure sensor; and a display circuit board attached to one side of the display panel and bent toward a bottom of the display panel to be settled in a middle frame, wherein the pressure sensor is disposed between the display panel and the display circuit board, wherein a first surface of the pressure sensor is attached to the display circuit board, wherein the middle frame comprises a receiving groove, which corresponds to the display circuit board and the pressure sensor, wherein the middle frame comprises a bottom surface, a recessed bottom surface recessed from the bottom surface and side surfaces disposed between the bottom surface and the recessed bottom surface, wherein the recessed bottom surface of the middle frame and the side surfaces of the middle frame define the receiving groove, and wherein at least a portion of the side surfaces of the middle frame overlaps the display panel in a first direction perpendicular to the recessed bottom surface of the middle frame.

16. The display device of claim 15 , wherein the display circuit board is spaced apart from the recessed bottom surface in the first direction.

17. The display device of claim 16 , further comprising: a panel bottom member disposed between the display panel and the pressure sensor, wherein a second surface of the pressure sensor is attached to the panel bottom member.

18. The display device of claim 17 , wherein the pressure sensor comprises; a first substrate and a second substrate; a first driving electrode, a second driving electrode, a first sensing electrode, and a second sensing electrode disposed on a first surface of the first substrate facing the second substrate; a first pressure sensing layer disposed on a first surface of the second substrate facing the first substrate; and a second pressure sensing layer contacting with the second driving electrode and the second sensing electrode, wherein the first pressure sensing layer overlaps with the first driving electrode and the first sensing electrode, and wherein gaps are formed between the first pressure sensing layer and the first driving electrode and between the first pressure sensing layer and the first sensing electrode.

19. The display device of claim 18 , wherein the second pressure sensing layer is disposed on at least one side of the second driving electrode and on at least one side of the second sensing electrode.